List of top Physics Questions

Match the LIST-I with LIST-II

LIST-I (Configuration of Bipolar Transistors)		LIST-II (Characteristics)
A.	Common Base	I.	Current Gain but no Voltage Gain
B.	Common Emitter	III.	Both Current and Voltage Gain
C.	Common Collector	II.	Voltage Gain but no Current Gain

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Match the LIST-I with LIST-II

LIST-I (Logic Gates)		LIST-II (Expressions)
A.	EX-OR	I.	\( A\bar{B} + \bar{A}B \)
B.	NAND	II.	\( A + B \)
C.	OR	III.	\( AB \)
D.	EX-NOR	IV.	\( \bar{A}\bar{B} + AB \)

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The gas constant is:

Specific heat of saturated water vapour at 100\(^{\circ}\)C is.

The molecular density of a gas is n and diameter of its molecule is d. The mean free path of molecule is:

The S.I. unit of compressibility is:

Fermions have spin value equal to:

According to the Dulong and Petit's law, the atomic heat of an element at constant volume:

Degree of degeneracy will be large when:

Quantum statistics changes into classical statistics if: (Symbols have their usual meaning)

In the steady state of temperature, the flow of heat across the body depends upon its:
A. thermal capacity
B. thermal conductivity
C. temperature difference across its opposite faces
D. thermal resistivity
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Which of the following statements are correct:
A. Specific heat of saturated water vapour at 100\(^{\circ}\)C is negative.
B. There is only one triple point of a substance.
C. Boiling point of every liquid rises with increase in pressure.
D. Latent heat can not become zero.
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A parallel-plate capacitor has a dielectric slab of thickness d and dielectric constant K inserted between the plates. The capacitance change compared to the vacuum case (when no slab is inserted) is:

For a system of particles, if the external net force acting on the system is zero, the system's center of mass is:

The electric field just outside a charged conductor is E. The electric field just inside the conductor is:

If an electromagnetic wave is totally reflected, the radiation pressure in terms of average Poynting vector S\(_{av}\) is:

The electric potential inside a charged conducting sphere is constant. The charge distribution inside the sphere will be:

In the context of conductors in electrostatic equilibrium, the relationship between electric field and the conductor's surface is:

The gravitational field at a point in space is:

True conditions for sustained interference of light waves are:
A. Two interfering sources must be coherent.
B. Two interfering waves must be propagated along the same line.
C. Two interfering waves must have equal amplitude.
D. If the interfering waves are polarized, they must be in the same state of polarization.
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A conducting sphere of radius R carries a total charge Q. The electric field at a distance r>R from the center is:

A point charge +Q is placed at the origin. The electric potential at point (3a,4a,0) in terms of k, Q and a is:

A long, straight wire carries a current of 10 A. The magnitude of the magnetic field at a distance of 5 cm from the wire is:

Inside a uniformly charged spherical shell, the value of the electric field at distance r from the center is:

The resolving power of a grating:
A. increases with increase in total number of lines ruled on grating.
B. increases with increase in total width of grating.
C. increases with increasing the order of spectrum as in Echelon grating.
D. increases with decreasing the order of spectrum as in Echelon grating.
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